caput vs noggin

caput

noun
  • The head. 

  • A knob-like protuberance or capitulum. 

  • The top or superior part of a thing. 

  • The council or ruling body of the University of Cambridge prior to the constitution of 1856. 

noggin

noun
  • The head. 

  • A signalling molecule involved in embryo development, producing large heads at high concentrations. 

  • A small measure of spirits equivalent to a gill. 

  • A small mug, cup or ladle; the contents of such a container. 

How often have the words caput and noggin occurred in a corpus of books? (source: Google Ngram Viewer )